BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Jan Matousek\, Charles University\n\n
Tra nsverse spin asymmetries that are observed in hadron production in DIS can be explained in the transverse-momentum-dependent (TMD) PDF approach as a rising from correlations between the spin and the intrinsic transverse mom entum of quarks and the spin of the parent nucleon. span>
\n\nThese correlations should give rise to transverse spin asymmetries for example in the production of Drell-Yan mu on pairs in the scattering of pi- off transversely polarized protons. The same effect could appear in J/psi production\, though the magnitude depend s on the production mechanism. COMPASS has collected data with pi- beam an d transversely polarized NH3 target and the analysis of the J/psi producti on is in progress. The production of J/psi in muon-proton scattering on th e other hand can proceed via the photon-gluon fusion process\, gamma* g -& gt\; c cbar. Measurement of this process thus allows to access the gluon T MD PDFs. COMPASS has measured this process with transversely polarized pro ton target and the results will be presented.< /p>\n DTSTART:20211116T203000Z LOCATION:Online\, Room via Zoom SUMMARY:Transverse spin asymmetries in J/psi production at COMPASS END:VEVENT END:VCALENDAR